Heel pulley block holding device



Feb. 28, 1933. A. R. CAMPBELL I HEEL PULLEY BLOCK HOLDING DEVICE Filed Aug. 2, 1929 INVENTOR 17/10 Z? Campbell ATTORNEY Patented Feb. 28, 1 933 i: v

UNITED STATES PATENT orr cr. 1 I

' l M ma. oAmrBELnorsAii rnnivcisco, canteens i I HEEL, PULLEYHBLQGK 119mm niivIoE Application filed au ust 2, 19 29. serial no; 383,116.

My invention relates to improvements in adjustably holding said block in any desired heel pulley block holding devices and the position, sai d friction meansbeing'capable object of myinvention is to provide simple, of supporting the Weight of the block and efficient and reliable friction means for holdcables but i being arranged to yieldci'n" the L ring a pulley block in a predetermined elevatevent'a strain is placedo'n the block to pered position.' I V nitithe block to automatically assume a po- The. invention is shown and described as "sitioninwhich the cable will lead fairly over applied to aheel block of the form commonly the block. I i

used-at the foot of a boom in cargo handling More specific objects aretoprovide a pulley I apparatus but is obviously adapted for use block embodyinga forked hanger arranged 160 in connection with substantially, any swiv-v ""toreceive and pivotallysupport a swivel eled pulley block. V zinember to which aapulleyis connected, said In the operation of the usual heel blocks block having adjustable friction means emof cargo handling apparatus, and of other bodied in the pivotal connection between the swiveled pulley blocks of similar nature, hanger and the swivel means.

' where the cable which passes over the block 1 Other and more specific objectswill be ap- ;is, at times, drawn through the blockin a parent from the following, description taken -slack condition, it is obvious that, whenthe inconnection with the accompanying drawa cable is slack, thepulley block 'will be caused ing. v v i I j 4 1 7 5 by gravity to hang down in a position. in i *In' the drawingFig'ure 1 is a perspective 70 which the cable will not lead fair over the View of aheel pulley block constructed in acpulley but will rub against-the sideof the cordance with my invention showing the block thus wearing ;both the blockland the same inan operative position in connection cable before sufficient tension'is exerted on. a spar. and boom of the form used for ZMJ2 the cable to lift the block into the proper handling cargo, fragments only of the spar position To overcome this difficulty in conand boom'being shown; w v

- nection with heel blocks, which are used at the Fig; 2 is a detached plan view on a larger foot of booms, on cargo handling apparatus, scale of the heel pulley block mounting, parts ithas heretofore been common practice to of the pulley frame being broken away;

hold up the outer end ofthe block by means -Figs. 3 and 4 are detached-elevations of Y of apieceof rope or chain tied-:to the boom the forked mounting'plate and pivotbolt reand to the heel :block or to stretch a cable ,spectively of the device shown in Fig. 2; 1

across the ship and support the outer end Fig.5 is a plan view of an alternative form .of the heel block from this cableby means. 2 of heel pulley'block mounting in which the 1.235 of a runnerpulley. Both of thesemethods resili'ent spring means is omitted 'from the 385 area makeshift and require constant ad: friction device; and

' justmentand are in the way and tend'to foul Fig. 6 isa' plan view of another alternaiandc'hafe the main cableland are-totally in: tive form of heel vpulleyfblock mountingsin operative for some positions of the boom.- which' a tapered bearing pin; is used'for oh- ::i;,: Another method, of holtling the' heel block taining thefrictionq f V i L90 up has been to square or flatten the end of Referring to the; drawing, throughout the swivel eye so that it will abut against the, which like vreference numerals designate like hanger and form a positive stop; 'This-m'ethparts, I'show a pulley block mounting emod is objectionable becaus'e'it does not probodying aforkedfhanger 7 having two spaced ;1.; vide forthe proper adjustment and results apart, forwardly extending, parallel side 9 V in a rapid deterioration ofthe swivel} i e plates or arms 8 and 9, provided respectively zIt-is an object of my present invention to 'withalarger-hole 1O constituting a bolt head overcome the difliculties hereinbefore' set receiving eye, and a, smaller hole; 11 constiforth by providing, a heel blockjwh'ich is tuting'a bolt shank receiving eye. The holes i equipped with adjustablefriction meansifor rlOcand ll are' disposed; in axial alignment 100,

lower end cf-a b'oom.22 solthat the vertical i.-pin -:1-8 constitutes apivot for the .boom. 22

a vertical pivot -'on-which the hanger m swing. The upper end of the pin 18 preferably terminates in an eye portion'19, which in the installation shown Fig.1,- maybe connected by a bolt 20 with a plate 21 on the V to swing on.

i The *head of .thebolt 12 is, freely movable :withinlrandthrough the larger hole .10 in one side "ofnthe clevis and. said hole 10 and the bolt 1 head .are. suitably .shap ed to prevent the es f bolt from turning. One method of preventcylindricalrhole is. to form a notch or key falug, ordowel 24 on vthe bolt head to fit into :the" notch23. v The sidetplates 8 and 9 of the hanger are spaced apart for (the reception therebetween of a swivel member 25 and two or more wash- "ers or plates 26' and 27 The bolt 12 has a lug "28 adjacent'itshead, which fits into a notch 29 in the washer 26 and prevents relative turning r movement between the washer 26. and the 'bolt'. This makes it impossible for z.;turning movement to occur between the inner zcen'd o'f the bolt head and'the washer, with. nconsequent'loss of friction and excessive the hanger an 7 pression spring 30 thereon. A nut 31 on the :-.wear,.as would be thejcase if thesev two parts were not locked together. c r

end o'fthe bolt adjustably:supportsthe outer 'end"'of the sp'ring30. The threads: on the bolt 12 are preferably inonerdirection, as.

screw the nut 31.

-The outer'enchof the swivelmember25 has n a shank 25"forming a swivel connection with a block 32 within which is journaled apulley or sheave 33 over which passesacable. 34.

The upwardly extending end of the cable 34; will usually pass over a sheave, not shown, at

" the upper endof the boom 22 and the lower I end'of said cable will ordinarilybe connected with a winch or winding drum, not shown.

Theio'perationof the friction is as follows:

' 5 ;The-'pre'ssure 'of the spring 30'a'g'a'inst thenut 31' draws thehead of the bolt 12"tightly- *against the' washer 1 26 thus gfr-ictionally file-crampin together:theiwasher'26, eye' In'em ber 25, washer 27 and hanger part 9. This holds the sheave block in any elevated position in which it is placed and prevents it from hanging down when the cable is slack. At the same time the sheave block is free to turn on the shank 25 of the swivel member and the clevis 7 is free to turn about the Vertical pivot.l8. e v '7 For any particular setting of the boom 22 there will be one proper elevated or inclined position of-theblock at the foot of the boom and that position will be such that the longitudinalfcenter line of the block will lie in the line of the resultant of the forces exerted the cable 34 in leading onto and off the of the block will always remain substantially the same for eachv setting of the' boom.

. The friction of the clutch is-suflicient tohold ain'g'turning'of awcylindrica'l bolt head 1n a:

up the weight of the heel block and cable but I .the 'heel block isselfadjusting to the pullof ,5 seat 23 in one side of the hole '10 and provide r the cable.

Where the pulley block is not to be used for a relatively long period of time, the nut 31 may be loosened to relieve the tension of the 'spr1ng 30. a

AQIn Fig. 5 I show an alternative form of the 1nvent1on in which the spring- 30- is dis- -1ne1'nbef-8. Thenut 35 is preventedffrom tllIIllIlgflbY suitable locking means, as a lock nut The operation-ofthis device is csubstantially the same as the operation of the 'd'evlcedisclosed in 'Figs. 1 to 4, except that 'it is necessary to accurately adjust the nuts at more frequent'intervals to secure' and maintain the desired tension.

"In Fig. 6 I have shown another alternative construction in which the swivel eye member is provided with a conical hole indicated atf38 anda bolt 39 having .a conically tapered portion 40 is arranged'to "fit within said tapered hole. The head end 41 of the boltc39imay besquare or hexagonal andmay "fit within a similarly shaped 'hole in the side .of. the. hanger member. A washer 421isfprovided between the'eye member 37 and the other side ofthehanger andmeans as aspring andnut areprovided for exerting a tension on the 'bo1t39. In this form of the invention the contacting sides, of -thehanger andthe washer. 42' and the eye meinber'37 togetherwithithe interfitting coneportions=38 and 40 constitutethe friction surfaces which tend to hold the blgck a desired elevated f POSitio y parts of my invention, without departing from the principle thereof, the above setting forth only preferred forms of embodiment.

I claim:

A pulley block holding device embodying a bracket; a hanger having a bifurcated end portion with a bolt shank receiving hole in one arm of said bifurcated end, a bolt head receiving hole in the other arm; means pivotally engaging the end of the hanger, op-

posite the bifurcated portion, to the said bracket'for horizontal movement; a bolt slidably mounted in the said holes in the bifurcated end portion of the hanger, having means on said bolt head engaging the hanger and preventing turning of the bolt; a pulley block swivel member pivotally mounted upon said bolt for vertical movement; a washer member non-rotatably secured upon said bolt and disposed between said swivel member and said bolt head; another washer member disposed between the swivel member and one 7 of the arms of said bifurcated portion of the hanger; a compression spring on said bolt on the outside of said last named bifurcated arm; and a nut on said bolt retaining said compression spring under pressure, whereby said swivel member is frictionally disposed as respects one arm of said bifurcated hanger and said non-rotatably mounted washer, thereby permitting the swivel member to be yieldingly held in any desired position of its vertical travel.

In witness whereof, I hereunto subscribe my name this 29th day of July, 1929.

ALVIN R. CAMPBELL. 

